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词汇 back up
释义 back up
1. drive or move backwards 倒车
* He had to back his car up because the mountain path was too narrow. 由于山路太窄,他不得不把车子倒了回来。
2. support 支持
* I hope you will back me up in this argument. 我希望在这场争论中你能支持我。
* Nobody backed her up when she protested against the decision. 当她反对这项决定时,没人支持她。
3. block; hold up 阻塞
* The vehicles were backed up because of the accident. 车辆因交通事故受阻了。
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